<?phpclass Lang{	static private $_lang = array();	static private $_langPack = 'zh_cn';		static public function init()	{		$langPack = 'zh_cn';		self::setLangPack($langPack);	}		static public function _($string)	{		return isset(self::$_lang[$string]) ? self::$_lang[$string] : $string;	}		static public function load($mode = '')	{		self::import('common');		if (!empty($mode))		{			self::import($mode);		}	}		static public function import($string)	{		$file = LANG_PATH.DS.self::getLangPack().DS.$string.'.php';		if (file_exists($file))		{			include($file);		}		else		{			die('Don\'t find the lang file: '.$file);		}		self::$_lang = array_merge(self::$_lang, $lang);	}		static public function setLangPack($string)	{		self::$_langPack  = $string;	}		static public function getLangPack()	{		return self::$_langPack;	}}